Monster Hunter: Freedom Unite Recomp

Monster Hunter Freedom Unite on PC and Android: an unofficial native port through static recompilation.

Download · Getting started · Multiplayer · Building · Credits · License

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Monster Hunter Freedom Unite (PSP) recompiled ahead of time from its MIPS code into C, then built as a native program for Windows and Android: no emulator runs the game. It adds what the PSP never had: online rooms anyone can join with a code, 60 FPS, widescreen, controllers, rearrangeable touch buttons and RetroAchievements.

Maintained by PateeerQ.

Important

Not affiliated with, endorsed by or sponsored by Capcom or Sony. You need your own copy of the game. No game data is included or downloaded: no disc image, EBOOT, firmware fonts, textures, audio or saves. "Monster Hunter" is a trademark of Capcom and is used here only to say which game this works with.

Highlights

Native	The EBOOT and all 298 overlays (menus, stages, monsters) recompiled to C; firmware reimplemented in the host
Online play	Create Server / Join Server with room codes and optional passcodes, on your Wi-Fi or over the internet relay; no port forwarding. PC and phone in the same room. Room chat and ping
60 FPS (beta)	The game at 60 fps and normal speed. A room plays at its slowest player's rate
One app, every release	Europe, USA, Japan and the FUComplete translation from one launcher and one app, told from your disc; every release can share a room
Mods	Widescreen, CWCheat cheats, and built-in mods: Target Camera + Crosshair, Damage Numbers, Gathering Node Indicators
Texture packs	HD packs made for PPSSPP (PNG or KTX2, with their style variants), optional
Android	Touch buttons you can move and resize, a swipe camera, weapon buttons that change with your weapon, a save folder you choose
PC launcher	Profiles, upscaling, fullscreen, key bindings, controller tester, RetroAchievements, update check, log
Controllers	DualSense, DualShock, Xbox and more (SDL3); the right stick moves the camera
RetroAchievements	Sign in once; unlocks pop up in game (softcore)

Supported games

Game	Region	ID	Status
Monster Hunter Freedom Unite	Europe	ULES01213	Playable: village, Gathering Hall, quests, online
Monster Hunter Freedom Unite	North America	ULUS10391	Playable: quests on PC and Android, 60 FPS, the built-in mods, online with every release
Monster Hunter Portable 2nd G	Japan	ULJM05500	Playable: quests on PC and Android, 60 FPS, the built-in mods, online with every release
FUComplete (MHP2G English translation)	—	ULJM05500	Playable: the translated .iso as it is, no EBOOT dump needed

Download

Get the newest build from Releases.

Platform	File	Needs
Windows 10/11 x64	FreedomUniteRecomp-v<version>-windows-x64-universal.zip	OpenGL 3.3 GPU
Android 8+ arm64	FreedomUniteRecomp-v<version>-android-arm64-universal.apk	OpenGL ES 3.0 GPU

Both check for updates by themselves (the launcher on PC, the app at start or from its menu).

Status

Version 0.4.2. The game boots, plays its movies, creates and saves a character, and runs the village, the Gathering Hall and quests in 3D at its own 30 fps, or 60 in 60 FPS mode, with sound, music, keyboard, controllers and touch buttons. Quests have been played start to finish, alone and together through a room, on PC and on Android (Poco X7 Pro).

Progress by area (rough estimates, 2026-11-06)

"Recompiled" means the code builds and is switched in when the game loads it; "tested" means someone has played through it.

Area	Progress	Notes
CPU recompilation (Allegrex + VFPU)		EBOOT and every overlay recompile; VFPU ops checked against PPSSPP as they turn up
Game overlays, recompiled		298 of 298, extracted from DATA.BIN (tools/re/databin.py)
Game overlays, tested in game		menus, village, house, Training School, Gathering Hall, quests on most maps (estimate)
System modules (firmware HLE)		threads, I/O, UMD/ISO, display, ctrl, utility dialogs, savedata, libfont, sceMpeg, sceAtrac, sceNetAdhoc, Netconf; missing: encrypted saves, the sound PRX
Graphics (GE + GL renderer)		textures, lighting, fog, skinning, clipping, render-to-texture, GL 3.3 and GLES 3.0; missing: stencil, colour test, logic op, mipmaps, culling, DXT, specular, points/lines
Audio		sound effects, music (ATRAC3/3+ via FFmpeg), movie sound; small gaps while loading
Movies		H.264 + ATRAC3+ via FFmpeg, own PSMF demuxer
Input		keyboard, mouse camera, controllers, touch buttons with a layout editor, swipe camera, weapon buttons
Save data		save and load; saves from a PSP or PPSSPP (encrypted) load too; on Android a save folder of your choice, kept in sync
Multiplayer (ad hoc over rooms)		LAN and internet rooms, passcodes, chat, ping, 60 fps rooms, every release in one room with its name shown; Gathering Hall and quests together; movement in the hall lags
Mods		widescreen, CWCheat cheats, three built-in code mods in every release
Texture packs		PPSSPP packs (quick/xxh32/xxh64 hashes, PNG, KTX2 as ASTC/BC7), styles from ADDONS; tested on PC, not yet on a phone
Performance		being worked on for low-end phones: the GE's vertex work is done on the CPU; vertex reads made direct (village about 18% lighter on PC)
RetroAchievements		sign-in, game identified, unlock toasts (softcore); not yet checked against a real unlock
Gameplay coverage		village life, full quests, the Gathering Hall together; more maps and monsters untested
PC release (launcher)		launcher, profiles, keys, controllers, achievements, mods, 60 FPS, updates, log, crash report
Android port		30 or 60 fps, touch buttons, layout editor, drawer menu, multiplayer, achievements, mods, save folder, crash log, updates
USA release (ULUS10391)		60 FPS and the built-in mods; quests on Android with the mods and weapon buttons, in one room with an EU player
Japan release (ULJM05500)		60 FPS and the built-in mods; quests and area changes on PC and Android, in one room with an EU player
FUComplete		the English translation's own code and voices; checked on PC and Android

It is early software: expect rough edges, and please report crashes (both apps can copy their crash log for you).

Getting started

You need your own copy of the game and three files made from it:

1. the disc image as an .iso: Freedom Unite Europe (ULES01213) or USA (ULUS10391), Portable 2nd G (ULJM05500), or the FUComplete translation
2. its decrypted EBOOT: in PPSSPP, Settings → Tools → Developer tools → "Dump decrypted EBOOT.BIN on game boot" (gives <game id>_EBOOT.BIN); not needed for FUComplete
3. the PSP's fonts: the .pgf files from PPSSPP's assets/flash0/font

Windows

1. Unzip FreedomUniteRecomp-v<version>-windows-x64-universal.zip.
2. Put the fonts in work\root\flash0\font.
3. Run mhfu_launcher.exe, choose the ISO and the EBOOT under Advanced, then press DEPART on the Play page.

Keyboard and mouse

Key	PSP
W / A / S / D	analog stick
Arrow keys	D-pad (camera)
K or Space / L / J / I	Cross / Circle / Square / Triangle
Q / E	L / R
Enter / V or Backspace	Start / Select
F3 / F4	FPS line / 60 FPS mode
F5 / F6	volume down / up
F7	mouse look on/off
Right mouse button held	mouse camera
F9	memory dump (for cheat makers)

Keys can be rebound on the launcher's Keyboard page. The game window's Options menu sets the volume, the mouse camera's sensitivity, mouse look and mods.

Android

1. Install FreedomUniteRecomp-v<version>-android-arm64-universal.apk (arm64, Android 8+).
2. Put the ISO and the EBOOT in one folder on the phone.
3. Open the app and pick that folder ("Use this folder"). After that it goes straight into the game.

The fonts are taken from PPSSPP when it is installed; otherwise put the .pgf files in that folder too.

• Touch buttons: stick, D-pad, face buttons, L/R, Select/Start. In a quest with the weapon drawn they become an attack pad, Dodge, Sheathe and buttons for your weapon (guard, aim, charge, Demon Mode, Spirit). Hidden while a controller is connected.
• Camera: drag a finger anywhere away from the buttons.
• Menu: swipe in from the left edge, press Back, or tap the menu button: Multiplayer, RetroAchievements, button layout and opacity, resolution, 60 FPS, mods, cheats, save folder, crash log, updates.
• Save folder: like PPSSPP's memory stick folder. Choose a folder you can see (for example Documents/MHFU) and your saves survive reinstalling, and saves from a PC can be brought in.

60 FPS mode (beta)

The game normally runs at the PSP's 30 fps. With 60 FPS (beta) on (the launcher's checkbox or F4 on Windows, the menu on Android) it runs at 60 at normal game speed: the community "60 FPS" cheat for ULES01213 is built into the recompiled code. Online, a room runs at its slowest player's rate (the chat says who).

Mods and cheats

• Widescreen: the camera's view fills a wide screen.
• Built-in mods (on by default, each can be turned off): Target Camera + Crosshair, Damage Numbers, Gathering Node Indicators.
• Cheats: CWCheat codes, as PPSSPP runs them, from cheats/ULES01213.ini; the launcher and the app can fetch the CWCheat Database. Cheats pause in online rooms, and achievements stop unlocking while one is on.

Multiplayer

1. One player chooses Create Server (optionally with a 4-digit passcode).
2. The others choose Join Server and pick the room from the list (players, lock, 30/60 FPS, ping), or type its code, like MH-4K7Q.
3. Everyone goes online in the game as usual: the Gathering Hall.

Rooms work on the same Wi-Fi or hotspot, or over the internet through the project's relay, between PCs and phones; nobody forwards a port. On PC it is the game window's Multiplayer menu, on Android the menu's Multiplayer. In a room, Select opens the room chat. Another relay can be set with relay=host:port in <root>/net.cfg.

Building from source

Note

The build recompiles your EBOOT. Everything made from the game (work/, build/) is gitignored and must never be committed or shared.

Windows

Needs CMake, Visual Studio Build Tools ("Desktop development with C++") and Python 3. 7-Zip extracts the ISO if installed; otherwise Windows mounts it.

git submodule update --init --recursive

.\scripts\setup.ps1 -Iso "<your MHFU .iso>" -Eboot "<decrypted EBOOT>"
.\scripts\run.ps1 -Window

setup.ps1 tells the region from the EBOOT, extracts the disc and all 298 overlays from DATA.BIN, recompiles the EBOOT and the overlays, and builds the game, the launcher and the tools. It copies the fonts from PPSSPP's install; give another folder with -Fonts <folder>. A USA EBOOT builds into work\us\ and build-us\ (run.ps1 -Region US).

Android

Needs the Android SDK, NDK 27.0.12077973 and a JDK 17–21. FFmpeg for Android is built once with scripts/build-ffmpeg-android.sh (Git Bash). Then, after the Windows setup has generated the C:

$env:JAVA_HOME = "$env:USERPROFILE\.jdks\jbr-21.0.11"
cd android; .\gradlew.bat assembleDebug          # -Pmhfu.region=US for the USA app
adb install -r app\build\outputs\apk\debug\app-debug.apk

See android/README.md.

Packaging a release

.\scripts\release.ps1            # -Region US for the USA build

writes release\v<version>\: the Windows zip and the APK. The version is MHFU_VERSION in host/about.h and versionName in android/app/build.gradle; they must match. Both packages contain code recompiled from your EBOOT (though no game files): keep that in mind before publishing them.

Repository layout

Path	What
psprecomp/	the recompiler toolkit, as a git submodule
launcher/	the PC launcher (mhfu_launcher.exe, Dear ImGui)
android/	the Android app: SetupActivity (game folder), MhfuActivity (the game, its dialogs), RoomPicker, SaveSync, CheatsDialog, CrashLog, Updater
host/main.c	loads the EBOOT, sets up the boot thread, runs, reports
host/window.c, host/window_sdl.c	the Win32 window; the SDL3 window (Android, Linux) with touch buttons, layout editor and menu
host/region.h	per-region game ID and the guest addresses the host reads
host/hle_mhfu.c	firmware MHFU needs that psprecomp lacks (UMD, Impose, system params, VTimers)
host/libfont.c	sceLibFont: the PSP's PGF fonts, which MHFU draws all its text with
host/utility.c	savedata, message dialogs, the on-screen keyboard
host/atrac.c, host/mpeg.c	sceAtrac3plus and sceMpeg, decoding with FFmpeg
host/audio.c, host/gamepad.c	sound output and controllers, through SDL3
host/mods.c	widescreen, cheats, built-in code mods
host/achievements.c	RetroAchievements through rcheevos
host/lobby.c, host/chat.c, host/stats.c	Create/Join Server, room chat, FPS and ping line
host/adhoc.c	sceNet, sceNetAdhoc (PDP/PTP), sceNetAdhocctl, sceWlan and Netconf over the room network
host/net/	the room network: protocol (proto.h), hub, client, sockets and threads
seeds/	functions only reached through a pointer built at run time (seeds/us/ for the USA build)
tools/re/databin.py	decrypts DATA.BIN as the game does and extracts every overlay
tools/mhfu_ovl.c	wraps an overlay as an ELF for allegrexrecomp
tools/fps60_patch.py, tools/mods_patch.py	build 60 FPS and the mods into the recompiled C
tools/region_seeds.py	makes the USA seeds from the European ones
tools/mhfu_netcheck.c	end-to-end check of the room network without the game
tools/make_icon.py, tools/touch_icons.py	the app icon; the touch button icons
patches/psprecomp/	the changes made to psprecomp, as patches
scripts/	setup.ps1, run.ps1, harvest.ps1, release.ps1
work/	everything made from the game (never committed)

Development runs

.\scripts\run.ps1 -Window            # close the window to stop

The window draws with OpenGL at -Scale times the PSP's resolution (default 2). -Renderer software uses psprecomp's reference rasteriser instead: slow, but it is the one the GL renderer is checked against.

-Name "Hunter" answers the game's keyboard without asking. -Press "300:CROSS,420:START" presses buttons at given game frames (500-560:UP holds a range) and -Snap 60 saves every 60th frame to work/root/frames/. MHFU_NO_GAMEPAD=1 ignores controllers.

work/run.log ends with a report: recompiled calls, the last function reached, firmware calls not implemented yet, GE work, and a framebuffer capture. A dispatch miss names an address that was not recompiled.

Credits

• psprecomp by sp00nznet: the static recompiler this is built on (MIT)
• PPSSPP: its source was the reference for the firmware's and the GPU's behaviour; the save data cipher (host/chnnlsv.c) is ported from its sceChnnlsv.cpp (GPL 2.0 or later)
• libkirk (Draan and the PSP scene, from PPSSPP's ext/libkirk, GPL 3): the PSP's KIRK crypto engine, used to read saves from a PSP or PPSSPP (third_party/libkirk)
• Basis Universal (Apache 2.0): KTX2 textures in texture packs
• OceanTriRecomp: the model for the approach
• SDL3 (zlib), FFmpeg (LGPL 2.1), rcheevos (MIT), Dear ImGui (MIT), nlohmann/json (MIT), stb (MIT / public domain)
• Touch button icons by Lorc and Delapouite, game-icons.net (CC BY 3.0)
• The "60 FPS" cheat and the CWCheat Database by the PSP cheat community; the built-in code mods by the MHFU modding community
• Everyone who tested and reported bugs

License

Copyright (c) 2026 PateeerQ. The code in this repository is released under the GNU General Public License, version 3 (since v0.4.0; it was MIT before): it includes libkirk (GPL 3) to read saves from a PSP or PPSSPP. Third-party components keep their own licenses (see Credits). The license covers this project's code only, not Monster Hunter Freedom Unite or anything made from it.